/Engine/Plugins/Experimental/HairModelingToolset/Source/HairModelingToolset/Public/HairModelingToolsetModule.h
If creating multiple copies of the ToolBuilder for a particular Tool would be problematic, it is the responsiblity of theIModelingModeToolExtensionimplementation to cache these internally, otherwise they will be garbage collected when the caller releases them.
virtual void GetExtensionTools ( const [FExtensionToolQueryInfo](API\Plugins\ModelingToolsEditorMode\FExtensionToolQueryInfo) & QueryInfo, [TArray](API\Runtime\Core\Containers\TArray)< [FExtensionToolDescription](API\Plugins\ModelingToolsEditorMode\FExtensionToolDescription) > & ToolsOut )